Mixing machine



4, 1934. I E WERNER 1,982,847

MIXING MACHINE Filed April 1. 1933 ATTORNEY Patented Dec. 4, 1934fLudlow E. Werner, Brooklyn, N. Y.

. Application April 1, 1932, Serial No. 602,426 g 3 Claims.

The invention relates to mixing machines and has for its main object toprovide a machine in which a novel movement is impartedto therotary;

member, causing a very thorough andvery rapid mixing of the ingredientsoperated on. Another object is toprovi'de a paddle'of a novelconstructi-onwhich will further aid in the rapid and thorough mixing ofthe ingredients. A further object is to provide .a machine which may beused for mixing 'a great variety of substances, and a still furtherobject is to provide a mixing machine .of, simple andstrongconstruction, easy to clean,

20 in which, however, modifications may be made without departing fromthe scope of the appended claims. In the drawing Fig. l is a frontelevation of the preferred embodirnent shown partly in cross-section,

Fig. 2 a "side elevation also shown partly in cross-section, and

Fig. 3 a plan view.

Referring now to all the views, simultaneously, the machine is mountedon a box-shaped base or frame 10 having an upwardly extending rearmember 11. A pair of bearings 12 support the main shaft 13 on which aworm 141s secured. This worm meshes with a worm gear 15 which is rigidlysecured on a short, vertical shaft 16 which rotates in a bearing 17mounted on the frame.

The worm gear is constructed with a shoulder 18 on which a pinion 19 iseccentrically mounted on a pin 20 which is riveted in the worm gear. Awasher 21 and pin 22 prevent displacement of the pinion. The pinion 19meshes with an internal gear ring 23 which is securely pinned to theunderside of the upper member of the frame 10.

A circular opening 24 is cut in the frame, concentric with the gearring, and a boss 25 which is formed on the pinion 19 extends upwardlythrough this opening.

A bowl holder 26 is provided with a flange 2'7 and a recess 28 in whichthe boss 25 fits tightly. The bowl holder is pinned to the boss so as toturn with it, and the iiange is of sufiicient size to cover the opening24. A mixing bowl 29 is inserted in the holder 26. While I find thatfriction alone will prevent it from turning in the 5;holder, suitablesecuring means may be used.

For example, a screw maybe employed as shown at 30.

The upper end of the rear member 11 termi nate's in lugs 31 and to thesea paddle frame 32 is hinged by means of a pin 33. This frame, 60 whichis bifurcated at therear, extends upwardly and forwardly and is providedwithjan open slot 34 at its front/end. A rod 35 is provided with aflattened part 35 near its/upper end and a threaded portion '37 at itsextreme upper end. 65 The' flattened part is insertedin the slot 34 andhinged therein by means of a pin 38. *Shoulder's 39 areformed atthelower end of the flattened part and an internally threaded knob 40 isplaced on the thread3'7. A stop 41 limits the upward to movement of theframe 32, while stops 42 limit "its downward movement by engaging with arod 43 which extends across the frame, The-stops 42 are provided withscrews 44 for adjusting the downward movement: of the frame. 1

The paddle consists of two oppositely disposed blades 45 and 46 to-whicha tubular shaft 47 is secured. This shaft 'fits snugly on the rod 35 andis held in place by bayonet joints '48. One of.

the blades is preferably made with horizontal g0 slots 49, while theother blade is made with substantially, vertical slots 50.

The machine operates in the following manner: Power is imparted to themain shaft 13 by any suitable means, as for example an electrical mo- 3%tor. As this shaft turns the worm 14 rotates the worm gear 15 whichconsequently rotates the pinion 19 on the circle described by theeccentrically-located pin 20. As this pinion meshes with the teeth ofthe internal gear ring 23 it is 6 also rotated on the pin 20, thusimparting two motions to the pinion. In Figs. 2 and 3 the center axis ofthe paddle is shown at A, while the center axis of the pinion 19, in theparticular position shown, is indicated at B. From this it will be seenthat the bowl 29, which through the bowl holder 26 is attached to thepinion, not only rotates on its axis B but that this axis also revolvesaround the axis A of the paddle.

Asthe paddle is stationary the material con- 1% tained in the bowl isforced against it and part of the materialis forced, alternately,through the slots 49 and 50. As these slots extend in differentdirections the material is thoroughly broken up and therefore morethoroughly mixed. The mo- 1% tion of the bowl also tends to compress thematerial between its wall and the paddle. The size of the paddle issuchthat it will touch the wall of the bowl when in certain positions.By using 4 a pinion with a number of teeth which is indi- 1% visible bythe number of teeth of the gear ring, the blades will eventually touchevery part of the bowl as it rotates, thus preventing the material fromadhering to the bowl.

The paddle is hinged to facilitate its removal from the bowl, but whenthe knob 40 is tightened the paddle is held firmly in place by theshoulders 39 being drawn against the frame 32. The paddle may beadjusted in relation to the bowl by means of the screws 44, so that theaxis A of the paddle may be tilted from the vertical position, shown inFig. 2, to any angular position between the vertical position and aposition in which this axis will intersect the axis 13 of the bowl. Or,in other words, to a position in which the tip of the paddle will bedirectly over the center of the bowl when the bowl is in the positionshown in Fig. 2. 1

Having described my invention and its operation, what I claim asnew andwish to protect by Letters Patent is- 1. In a mixing machine of theclass described;

prime to each other; and means for clamping thepaddle with its lowerpoint ina position over the circle described by the center of theeccentricallymounted gear, or in any position-between this angularposition and a position in which the axis of the paddle is parallel withthe axis of the bowl.

2. In a mixing machine of the class described; a stand having a lowercompartment and an upright member; amixing-bowl holder rotatinglymounted on said stand; a mixing bowl insertable holder contained withinthe compartment in the stand; said planetary gear train consisting of adriven member, a gear eccentrically mounted upon said driven member, anda stationary internal gear ring with which said first-mentioned gearmeshes and which is secured in the upper part of said compartment, thenumber of teeth of the gear ring and in the eccentrically-mounted gearbeing prime to each other; and means connected with the upright-memberfor clamping the paddle with its lower point in a position over thecircle described by the center of the eccentrically-mounted gear, or inany position between this angular position and a position in which theaxis of the paddle is parallel with the axis of the mixing-bowl holder.

3. In a mixing machine of the class described; a stand havinga lowercompartment and an upright member; a mixing-bowl holder rotatinglymounted on said stand; a mixing bowl insertable in said holder; anon-rotating, removable paddle supported from'said upright and suspendedwithin said mixing bowl; a planetary gear train for impartingplanetarymotion to the mixing-bowl holder containedwithin the compartment in theof, the gear ring and in'the eccentrically-mounted gear being prime toeach other; means connected with the upright member for clamping thepaddle with its'lower point in a position over the circle described bythe center of the eccentrically- -mounted gear, or in any positionbetween this angular position and a position in which the axis of thepaddle is parallel with the axis of the mixing-bowl holder; an openingformed in the top of the stand in which the eccentrically-mounted gearrevolves; and a flange associated with the mixing-bowl holder forcovering this opening.

7 LUDLOW E. WERNER.

